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coverage: Remove all unstable support for MC/DC instrumentation

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Zalathar
2025-08-06 22:02:01 +10:00
parent dc0bae1db7
commit 81ed042c8c
47 changed files with 29 additions and 3045 deletions
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44
compiler/rustc_codegen_llvm/src/builder.rs
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@@ -1886,48 +1886,4 @@ impl<'a, 'll, 'tcx> Builder<'a, 'll, 'tcx> {
) {
self.call_intrinsic("llvm.instrprof.increment", &[], &[fn_name, hash, num_counters, index]);
}
/// Emits a call to `llvm.instrprof.mcdc.parameters`.
///
/// This doesn't produce any code directly, but is used as input by
/// the LLVM pass that handles coverage instrumentation.
///
/// (See clang's [`CodeGenPGO::emitMCDCParameters`] for comparison.)
///
/// [`CodeGenPGO::emitMCDCParameters`]:
/// https://github.com/rust-lang/llvm-project/blob/5399a24/clang/lib/CodeGen/CodeGenPGO.cpp#L1124
#[instrument(level = "debug", skip(self))]
pub(crate) fn mcdc_parameters(
&mut self,
fn_name: &'ll Value,
hash: &'ll Value,
bitmap_bits: &'ll Value,
) {
self.call_intrinsic("llvm.instrprof.mcdc.parameters", &[], &[fn_name, hash, bitmap_bits]);
}
#[instrument(level = "debug", skip(self))]
pub(crate) fn mcdc_tvbitmap_update(
&mut self,
fn_name: &'ll Value,
hash: &'ll Value,
bitmap_index: &'ll Value,
mcdc_temp: &'ll Value,
) {
let args = &[fn_name, hash, bitmap_index, mcdc_temp];
self.call_intrinsic("llvm.instrprof.mcdc.tvbitmap.update", &[], args);
}
#[instrument(level = "debug", skip(self))]
pub(crate) fn mcdc_condbitmap_reset(&mut self, mcdc_temp: &'ll Value) {
self.store(self.const_i32(0), mcdc_temp, self.tcx.data_layout.i32_align.abi);
}
#[instrument(level = "debug", skip(self))]
pub(crate) fn mcdc_condbitmap_update(&mut self, cond_index: &'ll Value, mcdc_temp: &'ll Value) {
let align = self.tcx.data_layout.i32_align.abi;
let current_tv_index = self.load(self.cx.type_i32(), mcdc_temp, align);
let new_tv_index = self.add(current_tv_index, cond_index);
self.store(new_tv_index, mcdc_temp, align);
}
}